IT1015453B - Dispositivo di lettura ottica di una pista diffrangente appartenen te a un supporto d informazione in forma di disco o di nastro - Google Patents
Dispositivo di lettura ottica di una pista diffrangente appartenen te a un supporto d informazione in forma di disco o di nastroInfo
- Publication number
- IT1015453B IT1015453B IT24486/74A IT2448674A IT1015453B IT 1015453 B IT1015453 B IT 1015453B IT 24486/74 A IT24486/74 A IT 24486/74A IT 2448674 A IT2448674 A IT 2448674A IT 1015453 B IT1015453 B IT 1015453B
- Authority
- IT
- Italy
- Prior art keywords
- diffranging
- tape
- disc
- optical reading
- information support
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B7/0901—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following only
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/28—Systems for automatic generation of focusing signals
- G02B7/30—Systems for automatic generation of focusing signals using parallactic triangle with a base line
- G02B7/32—Systems for automatic generation of focusing signals using parallactic triangle with a base line using active means, e.g. light emitter
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/005—Reproducing
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Optical Recording Or Reproduction (AREA)
- Optical Head (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7324004A FR2235448B1 (it) | 1973-06-29 | 1973-06-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| IT1015453B true IT1015453B (it) | 1977-05-10 |
Family
ID=9121823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT24486/74A IT1015453B (it) | 1973-06-29 | 1974-06-28 | Dispositivo di lettura ottica di una pista diffrangente appartenen te a un supporto d informazione in forma di disco o di nastro |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US3971002A (it) |
| JP (1) | JPS5039102A (it) |
| DE (1) | DE2431206A1 (it) |
| FR (1) | FR2235448B1 (it) |
| IT (1) | IT1015453B (it) |
Families Citing this family (52)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5415484B2 (it) * | 1975-02-26 | 1979-06-15 | ||
| GB1542884A (en) * | 1975-04-01 | 1979-03-28 | Asahi Chemical Ind | Recording and reproducing holograms |
| FR2306495A1 (fr) * | 1975-04-04 | 1976-10-29 | Thomson Brandt | Systeme de lecture d'un enregistrement par exploration optique ponctuelle d'une piste diffractante |
| US4094013A (en) * | 1975-05-22 | 1978-06-06 | U.S. Philips Corporation | Optical storage disk system with disk track guide sectors |
| FR2313716A1 (fr) * | 1975-06-03 | 1976-12-31 | Thomson Brandt | Systeme optique de lecture par reflexion d'un support d'information |
| US4125860A (en) * | 1975-06-16 | 1978-11-14 | Nippon Telegraph And Telephone Public Corporation | Reproducer for an eraseable videodisc |
| FR2325987A1 (fr) * | 1975-09-29 | 1977-04-22 | Thomson Brandt | Dispositif de lecture optique d'un enregistrement |
| NL7612070A (nl) * | 1975-10-31 | 1977-05-03 | Hitachi Ltd | Inrichting voor het uitlezen van informatie. |
| US4025949A (en) * | 1975-12-31 | 1977-05-24 | Zenith Radio Corporation | Symmetrical astigmatic focus sensing system |
| NL7600843A (nl) * | 1976-01-28 | 1977-08-01 | Philips Nv | Inrichting voor het uitlezen van een registratie- drager waarop informatie, bijvoorbeeld en/of ge- luidsinformatie, is aangebracht. |
| FR2359476A1 (fr) * | 1976-07-23 | 1978-02-17 | Thomson Csf | Procede de lecture optique d'un support d'information et lecteur optique mettant en oeuvre un tel procede de lecture |
| DE2634243A1 (de) * | 1976-07-30 | 1978-02-02 | Bosch Gmbh Robert | System zur aufzeichnung und/oder wiedergabe von signalen mittels strahlen |
| JPS5363002A (en) * | 1976-11-18 | 1978-06-06 | Sony Corp | Signal recording system and disk type medium for recording signal |
| NL7703123A (nl) * | 1977-03-23 | 1978-09-26 | Philips Nv | Inrichting voor het uitlezen van een optische stralingsreflekterende registratiedrager. |
| US4142098A (en) * | 1977-07-05 | 1979-02-27 | Zenith Radio Corporation | Optical readout for reflective video discs |
| US4145758A (en) * | 1977-10-25 | 1979-03-20 | Drexler Technology Corporation | Error checking method and apparatus for digital data in optical recording systems |
| NL7809635A (nl) * | 1978-09-22 | 1980-03-25 | Philips Nv | Inrichting voor het uitlezen van een optische registra- tiedrager bevattende een stralingsreflekterende infor- matiestruktuur. |
| US4243850A (en) * | 1979-02-07 | 1981-01-06 | Eastman Kodak Company | Apparatus for tracking a record track on a video disc |
| FR2502800A1 (fr) * | 1981-03-24 | 1982-10-01 | Thomson Csf | Senseur optique d'asservissement de focalisation |
| US4504938A (en) * | 1981-04-07 | 1985-03-12 | Victor Company Of Japan, Limited | Device for feedback controlling focus of an optical system in an information recording/reproducing apparatus |
| JPS58147823A (ja) * | 1982-02-25 | 1983-09-02 | Mitsubishi Electric Corp | トラツクずれ検出装置 |
| JPS58150145A (ja) * | 1982-03-03 | 1983-09-06 | Toshiba Corp | 光学式デジタルデイスクプレ−ヤのトラツキング制御回路 |
| DE3429382A1 (de) * | 1983-08-10 | 1985-02-28 | Canon K.K., Tokio/Tokyo | Optischer kopf |
| JPS60197950A (ja) * | 1984-03-22 | 1985-10-07 | Toshiba Corp | 光学ヘツド |
| NL8403034A (nl) * | 1984-10-05 | 1986-05-01 | Philips Nv | Opto-elektronisch fokusfout-detektiestelsel. |
| US5056080A (en) * | 1989-09-22 | 1991-10-08 | Russell James T | Optical recording/reproducing system using interference techniques |
| US5202878A (en) * | 1990-05-24 | 1993-04-13 | Olympus Optical Co., Ltd. | Optical recording and reproducing method and apparatus for the same |
| US5121371A (en) * | 1990-06-18 | 1992-06-09 | Bernoulli Optical Systems Company | Optical servo system for magnetic disk |
| JP3289798B2 (ja) * | 1993-10-01 | 2002-06-10 | パイオニア株式会社 | 光学式情報読み取り方法及び装置 |
| FR2723243B1 (fr) * | 1994-07-26 | 1996-09-06 | Thomson Csf | Dispositif d'enregistrement et/ou de lecture de tetes magnetiques et son procede de realisation |
| KR100200848B1 (ko) * | 1995-06-26 | 1999-06-15 | 윤종용 | 2중 초점 형성방법 및 이를 이용한 광픽업 |
| KR970002945A (ko) * | 1995-06-26 | 1997-01-28 | 김광호 | 2중 초점 광픽업 |
| US5907530A (en) * | 1995-08-30 | 1999-05-25 | Samsung Electronics Co., Ltd. | Optical pickup device |
| KR100234257B1 (ko) * | 1995-08-30 | 1999-12-15 | 윤종용 | 대물렌즈 장치 및 안정된 포커스 서보 신호를 얻는방법 및 이를 적용한 광픽업 장치 및 두께가 다른 디스크를 판별하는 방법 및 두께가 다른 디스크로부터 정보를 재생하고 기록하는 방법 |
| USRE39025E1 (en) * | 1995-08-30 | 2006-03-21 | Samsung Electronics Co., Ltd. | Lens device including a light controlling mechanism and an optical pickup apparatus using a lens device |
| KR100200857B1 (ko) * | 1995-10-04 | 1999-06-15 | 윤종용 | 광픽업장치 |
| FR2739965B1 (fr) * | 1995-10-17 | 1997-11-07 | Thomson Csf | Dispositif emetteur-recepteur de lumiere et systeme de lecture optique |
| US5844676A (en) * | 1997-05-29 | 1998-12-01 | Quadrant Engineering, Inc. | Method and apparatus for measuring radial error of rotating encoded disks |
| FR2786345B1 (fr) | 1998-11-24 | 2001-02-09 | Thomson Csf | Dispositif de cryptage quantique |
| US7149173B2 (en) * | 2000-10-17 | 2006-12-12 | Thales | Medium for recording optically readable data, method for making same and optical system reproducing said data |
| FR2824905B1 (fr) * | 2001-05-15 | 2003-08-29 | Thomson Csf | Gyrometre a fibre optique |
| FR2849245B1 (fr) * | 2002-12-20 | 2006-02-24 | Thales Sa | Procede d'authentification et d'identification optique d'objets et dispositif de mise en oeuvre |
| US7085095B2 (en) * | 2003-10-20 | 2006-08-01 | Quantum Corporation | Electromagnetic void-sensing probes and position control systems |
| US7116514B2 (en) * | 2003-10-20 | 2006-10-03 | Quantum Corporation | Methods and systems for magnetic recording |
| US7136255B2 (en) * | 2003-10-20 | 2006-11-14 | Quantum Corporation | Servo methods and systems using masked medium edge position sensors |
| US7102845B2 (en) * | 2003-10-20 | 2006-09-05 | Quantum Corporation | Servo methods and systems using existing data structures and medium edge position |
| US7139152B2 (en) * | 2003-10-20 | 2006-11-21 | Quantum Corporation | Servo methods and systems using existing data structures and optical masks |
| US7149050B2 (en) * | 2003-10-20 | 2006-12-12 | Quantum Corporation | Diffractive position sensors and control systems |
| US7184233B2 (en) * | 2004-06-04 | 2007-02-27 | Quantum Corporation | Dual source tracking servo systems and associated methods |
| US20060103968A1 (en) * | 2004-11-12 | 2006-05-18 | Jurneke Joe K | Dynamic skew compensation systems and associated methods |
| US7499235B2 (en) * | 2005-03-18 | 2009-03-03 | Quantum Corporation | Auto-servo tape system and associated recording head |
| US7826169B2 (en) * | 2007-04-25 | 2010-11-02 | Quantum Corporation | Servo error detection and compensation utilizing virtual data tracking servo methods |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3703724A (en) * | 1971-07-22 | 1972-11-21 | Kms Ind Inc | Recorder with zone plate scanner |
| NL160138C (nl) * | 1972-05-11 | 1979-09-17 | Philips Nv | Inrichting voor het uitlezen van een vlakke registratie- drager. |
| US3829622A (en) * | 1972-10-24 | 1974-08-13 | Mca Disco Vision | Video disc player with variably biased pneumatic head |
-
1973
- 1973-06-29 FR FR7324004A patent/FR2235448B1/fr not_active Expired
-
1974
- 1974-06-26 US US05/483,433 patent/US3971002A/en not_active Expired - Lifetime
- 1974-06-28 IT IT24486/74A patent/IT1015453B/it active
- 1974-06-28 DE DE2431206A patent/DE2431206A1/de active Pending
- 1974-06-29 JP JP49074938A patent/JPS5039102A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5039102A (it) | 1975-04-11 |
| FR2235448A1 (it) | 1975-01-24 |
| US3971002A (en) | 1976-07-20 |
| DE2431206A1 (de) | 1975-01-16 |
| FR2235448B1 (it) | 1976-05-07 |
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